The answer would be 640. To find the number of how many copies are produced in 1 minute you have to write 80 divided by 5 which equals 16. Now you multiply 16 and the 40 minutes which gives you 640 copies.
10×+30=12×
10×-12×=-30
-2×=-30
×=15
Answer:
Look at the pics
Step-by-step explanation:
Hey, so when I was solving this I accidentally numbered the exercises differently than in your pic....
I just went from the left row to the right (and missed two...)
Hope it doesn't confuse you :]
If you have any questions about the way I solved it, don't hesitate to ask me =)